True in regards to the Glock design, false for the M&P as was previously noted. With the M&P, the trigger bar does not complete the cocking of the striker because the striker is held in a fully cocked condition by the sear.

True. I went to m&p armorer school. It is full cocked. Pulling trigger pivots the sear /bar, releasing the striker (that's already cocked). Its weird how a lot of people think different about this. Not sure why. Its pretty basic.